Arapahoe County Colorado

Welcome to Arapahoe County which has a rich, vibrant history and the distinction of being Colorado's first county. Arapahoe County spans 850 square miles and is a land of contrast. The western part of the county is mostly urban with residential, retail, office and industrial areas, while the eastern portion is relatively rural.

Spotlight

Arapahoe County, Colorado is the state's first county and the third largest with a total population of 631,096 and unincorporated population of 83,764. The County spans 805 square miles and is a land of contrast.

On Thursday, Nov. 15, 2018 at 9:00 a.m., Arapahoe County Sheriff’s Office deputies responded to Prairie Middle School in Aurora for a report of an attempted child abduction which occurred earlier that morning in unincorporated Arapahoe County. Read on...

Our population grows annually and is expected to reach 800,000 by 2030. With that level of growth, there are key areas that the County needs to take an in-depth look into. Learn more and join the conversation. Read on...

/CivicAlerts.aspx

Stay Engaged

Arapahoe County was named for the Arapaho Indians, who along with the Cheyenne Indians occupied most of Colorado when it was only a territory.

On Thursday, Nov. 15, 2018 at 9:00 a.m., Arapahoe County Sheriff’s Office deputies responded to Prairie Middle School in Aurora for a report of an attempted child abduction which occurred earlier that morning in unincorporated Arapahoe County. Read on...

Arapahoe County will hold a series of focus groups, surveys and community engagement sessions as a means to gauge citizen awareness about County services and to gain insight into what citizens want to see in the future. Read on...

Mon Nov. 19

Mon Nov. 19

Coffee with Your Commissioner - Meet Nancy Jackson
Meet Arapahoe County Commissioner Nancy Jackson, who represents District 4 for Coffee and Conversation. Learn about the County's services, ask questions, raise concerns to help make your community a better place to live.